/* ELF core file support for BFD.
- Copyright (C) 1995-2016 Free Software Foundation, Inc.
+ Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
return FALSE;
}
+ /* If both BFDs have identical build-ids, then they match. */
+ if (core_bfd->build_id != NULL
+ && exec_bfd->build_id != NULL
+ && core_bfd->build_id->size == exec_bfd->build_id->size
+ && memcmp (core_bfd->build_id->data, exec_bfd->build_id->data,
+ core_bfd->build_id->size) == 0)
+ return TRUE;
+
/* See if the name in the corefile matches the executable name. */
corename = elf_tdata (core_bfd)->core->program;
if (corename != NULL)
continue;
if (back->elf_machine_code == i_ehdrp->e_machine
|| (back->elf_machine_alt1 != 0
- && i_ehdrp->e_machine == back->elf_machine_alt1)
+ && i_ehdrp->e_machine == back->elf_machine_alt1)
|| (back->elf_machine_alt2 != 0
- && i_ehdrp->e_machine == back->elf_machine_alt2))
+ && i_ehdrp->e_machine == back->elf_machine_alt2))
{
/* target_ptr is an ELF backend which matches this
object file, so reject the generic ELF target. */
{
if ((bfd_size_type) statbuf.st_size < high)
{
- (*_bfd_error_handler)
- (_("Warning: %B is truncated: expected core file "
- "size >= %lu, found: %lu."),
- abfd, (unsigned long) high, (unsigned long) statbuf.st_size);
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("warning: %pB is truncated: expected core file "
+ "size >= %" PRIu64 ", found: %" PRIu64),
+ abfd, (uint64_t) high, (uint64_t) statbuf.st_size);
}
}
}
/* Save the entry point from the ELF header. */
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+ abfd->start_address = i_ehdrp->e_entry;
return abfd->xvec;
wrong:
fail:
return NULL;
}
+
+/* Attempt to find a build-id in a core file from the core file BFD.
+ OFFSET is the file offset to a PT_LOAD segment that may contain
+ the build-id note. Returns TRUE upon success, FALSE otherwise. */
+
+bfd_boolean
+NAME(_bfd_elf, core_find_build_id)
+ (bfd *abfd,
+ bfd_vma offset)
+{
+ Elf_External_Ehdr x_ehdr; /* Elf file header, external form. */
+ Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form. */
+ Elf_Internal_Phdr *i_phdr;
+ unsigned int i;
+
+ /* Seek to the position of the segment at OFFSET. */
+ if (bfd_seek (abfd, offset, SEEK_SET) != 0)
+ goto fail;
+
+ /* Read in the ELF header in external format. */
+ if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr))
+ {
+ if (bfd_get_error () != bfd_error_system_call)
+ goto wrong;
+ else
+ goto fail;
+ }
+
+ /* Now check to see if we have a valid ELF file, and one that BFD can
+ make use of. The magic number must match, the address size ('class')
+ and byte-swapping must match our XVEC entry, and it must have a
+ section header table (FIXME: See comments re sections at top of this
+ file). */
+ if (! elf_file_p (&x_ehdr)
+ || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
+ || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
+ goto wrong;
+
+ /* Check that file's byte order matches xvec's. */
+ switch (x_ehdr.e_ident[EI_DATA])
+ {
+ case ELFDATA2MSB: /* Big-endian. */
+ if (! bfd_header_big_endian (abfd))
+ goto wrong;
+ break;
+ case ELFDATA2LSB: /* Little-endian. */
+ if (! bfd_header_little_endian (abfd))
+ goto wrong;
+ break;
+ case ELFDATANONE: /* No data encoding specified. */
+ default: /* Unknown data encoding specified . */
+ goto wrong;
+ }
+
+ elf_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr);
+#if DEBUG
+ elf_debug_file (&i_ehdr);
+#endif
+
+ if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0)
+ goto fail;
+
+ /* Read in program headers. */
+ i_phdr = (Elf_Internal_Phdr *) bfd_alloc2 (abfd, i_ehdr.e_phnum,
+ sizeof (*i_phdr));
+ if (i_phdr == NULL)
+ goto fail;
+
+ if (bfd_seek (abfd, (file_ptr) (offset + i_ehdr.e_phoff), SEEK_SET) != 0)
+ goto fail;
+
+ /* Read in program headers and parse notes. */
+ for (i = 0; i < i_ehdr.e_phnum; ++i, ++i_phdr)
+ {
+ Elf_External_Phdr x_phdr;
+
+ if (bfd_bread (&x_phdr, sizeof (x_phdr), abfd) != sizeof (x_phdr))
+ goto fail;
+ elf_swap_phdr_in (abfd, &x_phdr, i_phdr);
+
+ if (i_phdr->p_type == PT_NOTE && i_phdr->p_filesz > 0)
+ {
+ elf_read_notes (abfd, offset + i_phdr->p_offset,
+ i_phdr->p_filesz, i_phdr->p_align);
+ if (abfd->build_id != NULL)
+ return TRUE;
+ }
+ }
+
+ /* Having gotten this far, we have a valid ELF section, but no
+ build-id was found. */
+ goto fail;
+
+wrong:
+ bfd_set_error (bfd_error_wrong_format);
+fail:
+ return FALSE;
+}